Writing instrument



FIG. 1 is a side view of the writing instrument with its cover;

FIG. 2 is a perspective view of the writing instrument without its cover;

FIG. 3 is a side view of the writing instrument without its cover;

FIG. 4 is a perspective view of the cover of the writing instrument; and,

FIG. 5 is a side view of the cover of the writing instrument.

The parts are shown separately in FIGS. 2-5, for ease of illustration. 

The ornamental design for a writing instrument, as shown and described. 